XSS in Gnome Epiphany

CVE-2021-45085

XSS can occur in GNOME Web (aka Epiphany) before 40.4 and 41.x before 41.1 via an about: page, as demonstrated by ephy-about:overview when a user visits an XSS payload page often enough to place that page on the Most Visited list.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.015 (70.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Patch, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
  • cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-45085?
CVE-2021-45085 is a medium-severity vulnerability in Gnome Epiphany, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-12-16.
How severe is CVE-2021-45085?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-45085 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.